Index: /issm/trunk-jpl/src/c/modules/Krigingx/Krigingx.cpp
===================================================================
--- /issm/trunk-jpl/src/c/modules/Krigingx/Krigingx.cpp	(revision 14054)
+++ /issm/trunk-jpl/src/c/modules/Krigingx/Krigingx.cpp	(revision 14055)
@@ -22,5 +22,5 @@
 	/*Intermediaries*/
 	int           mindata,maxdata;
-	double        dmindata,dmaxdata; //FIXME (Options come as double but we want to retrive integers)
+	double        dmindata,dmaxdata,dnumthreads; //FIXME (Options come as double but we want to retrive integers)
 	double        radius;
 	char         *output       = NULL;
@@ -40,4 +40,5 @@
 	options->Get(&dmindata,"mindata",1.);  mindata=int(dmindata);//FIXME (Options come as double but we want to retrive integers)
 	options->Get(&dmaxdata,"maxdata",50.); maxdata=int(dmaxdata);//FIXME (Options come as double but we want to retrive integers)
+	options->Get(&dnumthreads,"numthreads",double(num)); num=int(dnumthreads);//FIXME (Options come as double but we want to retrive integers)
 
 	/*Process observation dataset*/
@@ -119,4 +120,7 @@
 	}
 	else if(strcmp(output,"v4")==0){ //Inverse distance weighting
+#if !defined(_HAVE_GSL_)
+		_error_("GSL is required for v4 interpolation");
+#endif
 		/*initialize thread parameters: */
 		gate.n_interp     = n_interp;
@@ -138,4 +142,7 @@
 	}
 	else if(strcmp(output,"prediction")==0){
+#if !defined(_HAVE_GSL_)
+		_error_("GSL is required for v4 interpolation");
+#endif
 
 		/*initialize thread parameters: */